To poorly paraphrase a Kenny Rogers hit, you've got to know when to hold 'em, when to walk away and when to run. Except we're not talking about cards; we're dancing around a more delicate subject: the inevitable result of going "all-in" on a bucket of soda (since when is 32 ounces considered a small?). Let's face it: You're never going to make it through that "Lord of the Rings" trilogy, and denial won't keep you from running out of "Cleopatra" long before its 320 minutes are up.

Never fear: RunPee has you covered. Not only does this handy app list the slow times in each film best suited for taking care of business, it also tells you how long you can be away (usually four minutes) and what you'll miss. You can even have it buzz you as pee windows approach, although good film-watching etiquette demands keeping such annoyances to a minimum. The app also lists what happens in the first five minutes of the film, and whether there's a teaser clip waiting for you after the credits roll.